1. Motion, Forces, and Energy

3. Forces
force: is a push or pull; is measured in newtons; causes an object to accelerate, and can change the direction of an objects motion.

4. Applied force: An applied force is a force that is applied to an object by a person or another object. If a person is pushing a desk across the room, then there is an applied force acting upon the object. The applied force is the force exerted on the desk by the person

5. Frictional force: The friction force is the force exerted by a surface as an object moves across it or makes an effort to move across it. There are at least two types of friction force - sliding and static friction.
Example:

9. Forces that Act on Objects
Gravity
Friction
Drag
Lift
Thrust

11. Motion Affects
Position
Direction
Speed
Acceleration

14. Newton’s Law’s of Motion

15. Newton’s First Law
States: An object at rest stays at rest unless an unbalanced force acts on it.
*An object moving in a straight line at constant speed will continue doing that unless acted on by a force. This force is called friction. It is a force that resists motion between 2 surfaces that are in contact. It always acts opposite to the direction of motion.
Sir Isaac Newton

16. Inertia is the tendency to resist a change in motion
* Inertia is the tendency to resist a change in motion. * The more mass (amount of matter in an object) an object has, the greater the inertia. ** Example: A toothpick has less inertia than a pencil because it has less mass.

17. Newton’s Second Law
* States: A net force changes the velocity of the object and causes it to accelerate. *The more mass or inertia an object has, the harder it is to accelerate. More mass = less acceleration ** Example: pushing a refrigerator vs. pushing a grocery cart

18. Newton’s Third Law
States: Forces always occur in equal but opposite pairs. In other words, for every action, there is an equal and opposite reaction.
** Example: A rocket blasting off
Space Shuttle Columbia

19. Types of Energy
Potential
Kinetic
Thermal